Planetary differential radial dual-end-face mechanical seal

Abstract

The invention discloses a planetary differential radial dual-end-face mechanical seal. The left end is a medium side, the right end is an air side, the seal is composed of a planetary gear train and two friction pairs, the two friction pairs include a seal pair composed of a rotating seal ring next to a rotating shaft and a differential ring and a seal pair composed of a fixed seal ring away fromthe rotating shaft and a differential wheel, and a blocking medium is leaked to the air from the differential wheel. The rotating seal ring and the rotating shaft synchronously rotate, a back spring provides thrust to keep attaching to the end face of the differential wheel, the rotating seal ring and the differential wheel rotate in the same direction with different rotating speeds, the fixed seal ring is arranged in a fixed ring base, the back spring generates thrust to keep attaching to the end face of the differential wheel, the rotating seal ring and the fixed seal ring are flexible rings, and axial micro-amplitude sliding can be generated. The planetary gear train is composed of a center sun wheel, a planetary wheel, the differential wheel and an inner gear ring. The center sun wheelrotates along with the rotating shaft, the inner gear ring is connected with a shaft end fixed shell through a spline, an air side differential wheel and the medium side differential wheel are in rigid connection with a thrust bearing and are fixed, and only circumferential motion is allowed.

Description

Technical field: [0001] The invention relates to a shaft end seal of a rotary machine, in particular to a rotary mechanical seal device with a relatively high shaft speed, which uses a planetary reducer to distribute the rated speed to two stages in proportion, and is suitable for high-speed rotation of compressors, pumps, etc. Shaft end seal. technical background: [0002] Due to the advantages of small leakage, low power consumption, and good reliability, mechanical seals are widely used in shaft end seals of rotating equipment, such as compressors, pumps, agitators and other rotating machinery. However, with the improvement of the use requirements and working conditions of various rotating machines, more and more rotating shafts need to operate at high speed and ultra-high speed. Few of the existing mechanical seal materials can operate at extremely high linear speeds. It can work stably for a long time, which also limits the further popularization and use of mechanical ...

AI Technical Summary

Problems solved by technology

[0004] For this reason, in order to overcome the unsatisfactory sealing effect of the existing rotary mechanical seal at high speed and solve the problem of installation and drive of the differential wheel, the present invention provides a method that uses the planetary carrier as the differential wheel and flexibly installs the moving ring and the static ring. , and a compact mechanical seal arranged on the same side of the differential ring

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